代碼部分

? void

log4cplus :: PropertyConfigurator :: replaceEnvironVariables ()

{

std :: vector < log4cplus :: tstring > keys = properties . propertyNames ();

// 解析屬性文件中的內容 , 需要定義什么是主屬性 , 什么次屬性

-- 注意 propertyName 以及 substEnvironVars

??? std :: vector < log4cplus :: tstring >:: iterator ? it = keys . begin ();

??? for (; it != keys . end (); ++ it ) {

??????? log4cplus :: tstring ? key = * it ;

??????? log4cplus :: tstring ? val = properties . getProperty ( key );

??????? log4cplus :: tstring ? subKey = substEnvironVars ( key , getLogLog ());

??????? if ( subKey != key ) {

??????????? properties . removeProperty ( key );

??????????? properties . setProperty ( subKey , val );

??????? }

??????? log4cplus :: tstring ? subVal = substEnvironVars ( val , getLogLog ());

??????? if ( subVal != val ) {

??????????? properties . setProperty ( subKey , subVal );

??????? }

??? }

}

void

log4cplus :: PropertyConfigurator :: configureLoggers ()

{

??? // 定義屬性文件的屬性項

??? if ( properties . exists ( LOG4CPLUS_TEXT ( "rootLogger" ) )) {

??????? Logger ? root = h . getRoot ();

??????? // 加載有關根 log 模塊的信息

??????? configureLogger ( root ,

??????? properties . getProperty ( LOG4CPLUS_TEXT ( "rootLogger" )));

??? }

??? // 獲取子屬性部件

?? ? Properties ? loggerProperties =

??????????? properties . getPropertySubset ( LOG4CPLUS_TEXT ( "logger." ));

vector < tstring > loggers = loggerProperties . propertyNames ();

// 注意 ConfigureLogger 部分的內容 , 獲取有關屬性值的描述

??? for ( vector < tstring >:: iterator ? it = loggers . begin (); it != loggers . end (); ++ it ) {

??????? Logger ? log = getLogger (* it );

??????? configureLogger ( log , loggerProperties . getProperty (* it ));

??? }

}

void

log4cplus :: PropertyConfigurator :: configureLogger ( log4cplus :: Logger ? logger ,

????????????????????????????????????? ??????????? const ? log4cplus :: tstring & config )

{

??? // Remove all spaces from config

tstring ? configString ;

// 如何實現 trim 的功能，實現一個范型的方法調用

??? remove_copy_if ( config . begin (), config . end (),

?????????????????? string_append_iterator < tstring >( configString ),

?????????????????? bind1st ( equal_to < tchar >(), ' ' ));

// "Tokenize" configString

// 分離字符部分的內容 , 按照 ? “,” 進行分隔

??? vector < tstring > tokens ;

??? tokenize ( configString , ',' ,

???????????? back_insert_iterator < vector < tstring > >( tokens ));

??? if ( tokens . size () == 0) {

??????? getLogLog (). error (? LOG4CPLUS_TEXT ( "PropertyConfigurator::configureLogger()- Invalid config string(Logger = " )

????????????????????????? + logger . getName ()

????????????????????????? + LOG4CPLUS_TEXT ( "): \"" )

????????????????????????? + config ?

????????????????????????? + LOG4CPLUS_TEXT ( "\"" ));

??????? return ;

??? }

?